Cal Dive (DVR) -1.7% premarket after warning of lower than expected Q1 results due to the...

Cal Dive (DVR) -1.7% premarket after warning of lower than expected Q1 results due to the cancellation of a vessel contract in Africa, lower than expected pricing for surface diving services in the Gulf of Mexico, and rising employee medical costs. DVR softened the blow with news of a lucrative subsea contract from Mexican state oil giant Pemex.